From patchwork Mon Oct 28 13:59:10 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Price X-Patchwork-Id: 11215595 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id F3113912 for ; Mon, 28 Oct 2019 14:00:28 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id BF58F21783 for ; Mon, 28 Oct 2019 14:00:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BF58F21783 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 33E4B6B028E; Mon, 28 Oct 2019 10:00:25 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 2F1226B0290; Mon, 28 Oct 2019 10:00:25 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 142B76B0291; Mon, 28 Oct 2019 10:00:25 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0056.hostedemail.com [216.40.44.56]) by kanga.kvack.org (Postfix) with ESMTP id E4E3E6B028E for ; Mon, 28 Oct 2019 10:00:24 -0400 (EDT) Received: from smtpin14.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with SMTP id 617F7824999B for ; Mon, 28 Oct 2019 14:00:24 +0000 (UTC) X-FDA: 76093353168.14.crime39_2097de8558d10 X-Spam-Summary: 2,0,0,a458e4711442c001,d41d8cd98f00b204,steven.price@arm.com,::steven.price@arm.com:luto@kernel.org:ard.biesheuvel@linaro.org:arnd@arndb.de:bp@alien8.de:catalin.marinas@arm.com:dave.hansen@linux.intel.com:mingo@redhat.com:james.morse@arm.com:jglisse@redhat.com:peterz@infradead.org:tglx@linutronix.de:will@kernel.org:x86@kernel.org:hpa@zytor.com:linux-arm-kernel@lists.infradead.org:linux-kernel@vger.kernel.org:mark.rutland@arm.com:kan.liang@linux.intel.com:akpm@linux-foundation.org,RULES_HIT:41:69:355:379:541:800:960:973:988:989:1260:1261:1311:1314:1345:1359:1437:1515:1534:1541:1711:1730:1747:1777:1792:2393:2559:2562:2730:3138:3139:3140:3141:3142:3352:3865:3866:3867:3868:3870:3871:3872:5007:6261:6742:6743:8603:8634:9036:10004:11026:11658:11914:12043:12296:12297:12517:12519:12555:12895:13069:13311:13357:13894:14181:14384:14394:14721:21063:21080:21451:21627:30029:30054,0,RBL:217.140.110.172:@arm.com:.lbl8.mailshell.net-62.2.0.100 64.100.201.201,CacheIP:none,Bayesi an:0.5,0 X-HE-Tag: crime39_2097de8558d10 X-Filterd-Recvd-Size: 3599 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf33.hostedemail.com (Postfix) with ESMTP for ; Mon, 28 Oct 2019 14:00:23 +0000 (UTC) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 89128337; Mon, 28 Oct 2019 07:00:23 -0700 (PDT) Received: from e112269-lin.cambridge.arm.com (unknown [10.1.194.43]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id F28273F6C4; Mon, 28 Oct 2019 07:00:20 -0700 (PDT) From: Steven Price To: linux-mm@kvack.org Cc: Steven Price , Andy Lutomirski , Ard Biesheuvel , Arnd Bergmann , Borislav Petkov , Catalin Marinas , Dave Hansen , Ingo Molnar , James Morse , =?utf-8?b?SsOpcsO0bWUgR2xpc3Nl?= , Peter Zijlstra , Thomas Gleixner , Will Deacon , x86@kernel.org, "H. Peter Anvin" , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Mark Rutland , "Liang, Kan" , Andrew Morton Subject: [PATCH v14 22/22] arm64: mm: Display non-present entries in ptdump Date: Mon, 28 Oct 2019 13:59:10 +0000 Message-Id: <20191028135910.33253-23-steven.price@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191028135910.33253-1-steven.price@arm.com> References: <20191028135910.33253-1-steven.price@arm.com> MIME-Version: 1.0 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Previously the /sys/kernel/debug/kernel_page_tables file would only show lines for entries present in the page tables. However it is useful to also show non-present entries as this makes the size and level of the holes more visible. This aligns the behaviour with x86 which also shows holes. Signed-off-by: Steven Price Acked-by: Catalin Marinas --- arch/arm64/mm/dump.c | 25 +++++++++++++------------ 1 file changed, 13 insertions(+), 12 deletions(-) diff --git a/arch/arm64/mm/dump.c b/arch/arm64/mm/dump.c index 9d9b740a86d2..3203dd8e6d0a 100644 --- a/arch/arm64/mm/dump.c +++ b/arch/arm64/mm/dump.c @@ -269,21 +269,22 @@ static void note_page(struct ptdump_state *pt_st, unsigned long addr, int level, if (st->current_prot) { note_prot_uxn(st, addr); note_prot_wx(st, addr); - pt_dump_seq_printf(st->seq, "0x%016lx-0x%016lx ", + } + + pt_dump_seq_printf(st->seq, "0x%016lx-0x%016lx ", st->start_address, addr); - delta = (addr - st->start_address) >> 10; - while (!(delta & 1023) && unit[1]) { - delta >>= 10; - unit++; - } - pt_dump_seq_printf(st->seq, "%9lu%c %s", delta, *unit, - pg_level[st->level].name); - if (pg_level[st->level].bits) - dump_prot(st, pg_level[st->level].bits, - pg_level[st->level].num); - pt_dump_seq_puts(st->seq, "\n"); + delta = (addr - st->start_address) >> 10; + while (!(delta & 1023) && unit[1]) { + delta >>= 10; + unit++; } + pt_dump_seq_printf(st->seq, "%9lu%c %s", delta, *unit, + pg_level[st->level].name); + if (st->current_prot && pg_level[st->level].bits) + dump_prot(st, pg_level[st->level].bits, + pg_level[st->level].num); + pt_dump_seq_puts(st->seq, "\n"); if (addr >= st->marker[1].start_address) { st->marker++;